METAL/SPIRAL WOUND GASKETS

Engineering Data/FAQs



Factors Affecting Gasket Performance

A gasket is any deformable material which, when clamped between essentially stationary faces, prevents the passage of media across the gasketed connection.

Compressing the gasket material causes the material to flow into the imperfections of the sealing areas and effect a seal. This bond prevents the escape of the contained media. In order to maintain this seal, sufficient load must be applied to the connection to oppose the hydrostatic end force created by the internal pressure of the system.

Gasket performance depends on a number of factors, including:

  1. Gasket Metal and Filler Material: The materials must withstand the effects of:

    • Temperature: Temperature can adversely affect mechanical and chemical properties of the gasket, as well as physical characteristics such as oxidation and resilience.
    • Pressure: The media or internal piping pressure can blow out the gasket across the flange face.
    • Media: The gasket materials must be resistant to corrosive attack from the media.

  • Joint Design: The force holding the two flanges together must be sufficient to prevent flange separation caused by hydrostatic end force, resulting from the pressure in the entire system.

  • Proper Bolt Load: If the bolt load is insufficient to deform the gasket, or is so excessive that it crushes the gasket, a leak will occur.

    Surface Finish: If the surface finish is not suitable for the gasket, a seal will not be effected.



    WARNING:
    Properties/application shown here are typical. Your specific application should not be undertaken without independent study and evaluation for suitability. For specific application recommendations consult Garlock. Failure to select the proper sealing products could result in property damage and/or serious personal injury.

    Performance data published here has been developed from field testing, customer field reports and/or in-house testing.

    While the utmost care has been used in compiling this information, we assume no responsibility for errors. Specifications subject to change without notice. This edition cancels all previous issues. Subject to change without notice.



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